Has anyone else grown it from seed? I started some of the tricolor, sometimes called Summer Poinsettia, several weeks ago. It germinated quickly, but doesn't seem to be growing. When they got to be about 2 in. tall I potted them individually, but none of them has grown higher than 3 in. after 3 weeks. I've tried fertilizer, but still no growth. Any ideas or suggestions? Are they slow to grow at first and then zoom up later in the summer? They are supposed to get 3-4 ft. tall.

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